Plumb-level and protractor



H. L. HUNTER- PLUMB LEVEL AND PROTRACTOB- APPLICATION mgn' JUNE 16,1920.

Patented Dec.13,1921L 2 SHEETS-SHEET I.

I I l I l I I I I.

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HERBERT Ii. irnnrnn', or. (ins antiate-I Specification. v j Y Thisinvention relates to a plumb'levelf provided with an extensible stock,'a dial, and means covers both the dial and 'the'button control-.1

' With these various rnnivre-nnvnnenn rnornao'roa .To all whom it mayc0mm.-.

a citizen of'the United btates', residing at Cleveland, in the countyofCuyahoga and State of Ohio, have invented certain new and useful"Improvements in. Plumb-Levels and Pro-tractors, of whi h the followingisa for illumlnating the dial, the extension forming a cover which inclosed position ling the illuminatingmeans. That portion of theinvention relating direc'tlyto said ex-' tension or cover isthe subjectmatter of -a divisional application filed February and bearing SerialNumber 441,527.

struction hereinafter described, pointed out in the claim, and shown'inthe accompany- 1 Fig.2 is a section on the line 2-2 of Fig. 1.

. tended.

1 which is preferably of m drawings, in which r 1 sections beingextended.

Fig. 3 1s a rear view, the casing being ex- Fig. 4 is-jasection'th'rough thestock and dial showing a modified form.

Fig.5 is a sectiononthe line 5-5 ofFig. 3, In constructing the device'Iemploya'stock wood and of any desired size.. This stock is provided witha longitudinal groove 2 extending along its top and bottom edges,andplacedmidway the front and back faces of the stock. The stock isinclosed by a metal casing-3,formed in two the stock, the sections wheninclosed posi- .tion meeting midway theends ofthe stock.

i tion, the.

longitudinal tongues 4:. which slide in "1 sections, one of which slidesan one end of the stock and the other on the opposite end of Thesesections are provided with interior, the

grooves 2 of the stock.

tions have secured in them inwardly extending pins 5 which workincsuitable end bores formed in the stock; To look the sections toextended or closed p'osifollowing parts are employed. The backof the'stock is provided with suitable. transverse the stock, either 111 boresconnecting with the bores "in which the pins 5 workr In these trans-Application liled. Jamie; 1920'.

nuts rest, th

objects in view the in# vention consists of the novel features of con- Icess,

gure 1 is a front ele'vatiomthe casing;

The closed outer ends ofqthe casing sec I Specification ofLettersjPatent.

Serial 1101389434. 7

verse I fit threaded isleev'es- 6 havlng asecuringflange'T whioh isicouit l 1 sunk-intothe face, fth t k; y p ,g- I 1 .Alscrewfiworks-ineachsleeve andis-pro- '5 vided at its outer end with athumb nut8- and '2 the casing sections'are provided with: slots 9v position. I

I set into:

tractor 10. In the ce having beveled sides,'in which said thumb v 7length of these slotsregulating 1 'the sliding movement of the casings'ections'. It will be'obvious that when the nuts are 7 turned down thescrews will bear on the pins 6 5, thus locking the casing sections inadjusted 1 the rear faceofthe a formed arecess 11 and atransverse boss.12

11', is secured a circular dial plate-13,7ofa

is centrally arrangedwith respect tosaid re-"f the boss b'eingfiangedand suitably :se-I cured to the back face of the stock. To the' frontendof the boss, and within the recess of which are angled inwardly'asshown at 14;";

A securing p1n 115extends through the bos s I andthe dial plate isthreaded onto the front 1 pro ecting portion of said pin. Mounted onface of the marginal portion of thefdi al, as

the boss, and back of the dial plate, is a pen-;j

shown most clearly in Fig. 2. a The pendulum: f and its index fingerismountedon suitable ball bearings18placed on the boss 12.

To illuminate the dial face I form a recess of the recessll, butcommunicating therewith, In said recess I placefa flashlight ,20 Theside marginsof the recess are stepped'or rabbetedand the recess iscovered b a retaining plate '21 which holds the flash li ht in place.This plate has a slot for the push buttoniof the flash light to 'proiectI throu hand work in,and the plate 21 is set V fin a suflicient distanceso that the cover cas ing section on that end of thestockcan slide overthe button 22;

19 in the front of the stock andto one side e 4: I have s own amodifiedlform of dial plate.

marginal portion 25 is set in the back of the recess and bears againstthe stock. The index member 26, including finger and weight is mountedlnadvance ofthe dial plate,2on ball I bearings 27, and the centralportion of the dial plate and arts of the index member are covered by acover plate 28. All of these parts are set into the ,front face of thestock and are covered and protected by the casing sections when inclosed position.

When this form of dial is used it need not be of transparent material asthe light is thrown on the front of the dial face instead of on theback. Except for the reversal of the parts the two dial forms aresubstantially alike and operate in the same manner.

The use of levels of this kind is well known and the advantages oftheconstruction above described and shown in the drawings will be apparentto those skilled in'the manufacture and useof plumb levels andprotractors.

What I claim is The combination with a stock having communicatingrecesses, a dial arranged in one recess, a weighted index finger for thedial, a

' flash light arranged in the other recess, a re- In testimony whereof lhave afiiXed my signature. o

HERBERT L. HUNTER.

